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Fri, 9 Dec 2016 17:51:14 PSTBLOX v1.01Test Tools: A polarity testerhttp://www.instructables.com/id/Test_Tools_A_polarity_tester/
Test Tools: A polarity tester - More DIY How To Projects]]>
https://cdn.instructables.com/FTA/ZFKD/FQ6E5P3W/FTAZFKDFQ6E5P3W.SQUARE2.jpghttps://cdn.instructables.com/FTA/ZFKD/FQ6E5P3W/FTAZFKDFQ6E5P3W.SQUARE.jpghttps://cdn.instructables.com/FTA/ZFKD/FQ6E5P3W/FTAZFKDFQ6E5P3W.SMALL.jpgGoodhartThis is a simple but very handy little device to have around the home and workshop, which will help determine the polarity of two wires, or contact points of a DC circuit. EDIT / UPDATE: If you wish to also use this circuit for voltages LOWER then 12 v or so, you may need to install a bypass switch...By: Goodhart